Stub buffing-gear.



A. C. DAVIDSON.

STUB BUFFING GEAR.

APPLlcATloN FILED xuLY 21. 1915.

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STUB BUFHNG GEAR.

APPLICATION FILED IuLY 21. I9I5.

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ARTI-IUE C. DAVIDSON, OF CHICAGO, ILLINOIS, ASSIGNOR T0 WAU'GI-I 'DRAFT GEAR COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

STUB BUFFING-GEAR.

Application filed July 21, 1915.

To all whom t may concern:

Be it known that I, ARTHUR C. DAVIDSON, a citizen of the United States, and a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Stub Bufling-Gears; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the `accompanying drawings, and to the numerals of reference marked thereon,which form a part of this specification.

Platform gears are generally associated with passenger cars to take up bufing stresses, but in some types of cars, such as blindbaggage, refrigerator, or express cars, it has been found diflicult, if not impossible,

p to adapt a conventional form of platform gear to the ear. This invention relates to an improved type of bufling gear known as a stub buffer, adaptable for attachment upon cars with which the usual type of platform buing gear cannot be readily associated, and embodyingl simplified features of construction which permit connection of the gear to a car without alteration thereof.

It is an object therefore of this invention to construct a buiiing gear adaptable to cars without necessitating alterations in the structure thereof, and designed particularly for connection upon those types of cars not provided with platforms.

It is also an object of this invention to construct a stub buffer embracing a combination of shock absorbing mechanisms to absorb both light and heavy impacts imparted thereto.

vIt is furthermore an important object of this invention to construct a buiing gear embracing a casing adapted to be attached upon a car and to receive engaged therein Vmechanisms guided by means which are attached to the casing after said mechanisms are put in place, said mechanisms co-acting with other elements associatedv with the buf- .fer plate to absorb impacts.

Itis finally an object of this invention to construct a device simple in operation and i Specification of Letters Patent.

Serial No. 41,040.

In the drawings:

Figure 1 is a fragmentary top plan view partly broken away and shown in section, of a bul'mg gear embracing the principles of my invention.

Fig. 2 is a section taken on line 2 2 of Fig. 1, with parts shown in elevation.

Fig. 3 is a central section taken on line 3-3 of Fig. 1, with parts omitted and parts shown in section.

Fig. 4f is a detail section with parts omitted taken on line LA of Fig. 1.

As shown in the drawings:

The reference numeral 1, indicates as a. whole the end sill of a car, to which is bolted a single heavy casting having a top wall 2, a bottom wall 3, side walls 1-, relan tively short in length and turnedoutwardly as shown in Fig. 1, and denoted by the reference numeral 5, vand with a number of reinforcing ribs 6, integral with the top wall and the inner or back wall 7, of the casting. At the forward outer ends of said casting, as clearly shown in Figs. 1 and 2, tubular members 8, are formed, being integrally connected to saidtop and bottom walls 2 and 3, respectively, by webs or ribs 9. Formed upon the under surface of said top wall 2, as clearly shown in Fig. 2, are parallel retaining ribs 10, and formed upon the upper surface of the bottom wall 3, as shown in Figs. 1 and 2, are similarly disposed retaining ribs 11. The purpose of said retaining ribs 10 and 11, is to permit insertion between the top and bottom walls 2 and 8, of

vor shank 15, integral therewith, has first been placed within the casing, togetherwith a group of friction plates 16, which seat between the walls 1l, over a concavev surface 17, formed in the back wall of the casting, and disposed behind said abutment head 14.

As clearly shown in Figs. 2 and 3, the rear wall 7, 'of the casting is extended downwardly andtogether with side walls 18, and slotted front wall 19, 'aifords a rigid connec- Patented Dec. d, 191% tion for an integral bottom plate 20, to which is attached in the manner shown in Fig. 2, a heavy yoke 21, by means of bolts The purpose of said yoke 21, is to support an elementl 23, which may be a simple drawbar attached -on the car, or a combination drawbar and draft gear, but since the details of construction of which form no part of this invention, the same are omitted. The movable member or bufling plate of the gear which receives the direct impact, consists of a heavy cast plate 24, which, on its interiorl surface, as clearly shown in Fig. 4, is reinforced by a number of ribs and alongv its upper portion has formed integral therewith a rearwardly. extending plate 25, which overlaps the top wall plate 2, of the main casting, having sliding engagement therewith. A circular rib 26, is formed on the inner surface of said abutment plate 24 and engaged therearound. and seating against the rear wall ofl said plate is a heavy coiled spring 27, which also lits into the hollow rectangular extension 15, of the converr follower element 14, hereinbefore described.

Rectangular shaped recesses 28, are provided near each end on the inner side of said abutment plate 24, each having a centrally disposed groove 29, and cover plates 30, are provided,A adapted to be secured over said recesses-by meansof rivets 31. Each of said cover plates 30, as clearly shown in Figs. 1 and; 4, is likewise deformed, as indicated byy the reference numeral 32, to form a groove en y its inner surface to register with the groove29, thus affording substantially a cylindrical recess within which may seat a cylindrical member 33, inserted through andrsecured within the apertured endr of a guide bar 34, thus permitting a certain amount of pivotal movement of said guide bar w-ith respect to the abutment plate 24, dueto such connection. Said guide bars 34, extend' through: the tubular elements 8, of the main casting, and also through aperturesprovided in the extension walls 5, and eachbarat itsend, is provided with a cotter pin; 35, therethrough, to limit the outward movementl thereof.'

Coiledyabout, each of vsaid guide bars 34, is a.V relatively heavy compression spring-36, seating; atone end against a collar formed on the forward. or outer end of the guide bari, and ait its other end against a boss formed onthe extension wall, ofthe casting, thus resisting inward movement ofthe guide bar. Apertures or recesses 37, may be provided in the rear wall 7, of the main castihgt;o aff-ord clearance for-the rear ends of thegu-ide-bars 34, when thesame arethrust inwardly :their maximum amount'. As clear-ly showin, a peripheral `flange 38, is formed oni the outer end of the member 15, to limit the inward movement thereof, and

side langes'39, are also formed thereon aeting to limit the outward movement thereof by contact with the guide elements 12.

The operati-on is as follows:

rIhe various coiled springs, to-wit 27 and 3G, co-act with one another and with the resilient friction plates 1G, to absorb impacts imparted to the gear due to contact of other objects, such as cars or bilder blocks, with the forward buffer plate 24. Due to the pivotal connection of said buffer plate 24, with the guide bars 34, and the non-rigid central connection thereof, to-wit the spring 27, a deformation of the gear may take place to compensate for impact stresses imposed thereon on one side or the other of the cen tral axis of the gear. In the absorption of the stresses the coiled springs irst act to resist movement of the buffer plate 24, being compressed due to rearward movement thereof, and subsequently if the impact is suliiciently great, the resilient friction plates 1G, come into action and are deformed be tween the convex head 14,l and the concave seat 17, resisting such deformation, of course, mainly by their friction, and also due to their resilience. Of course in this event, the member 14-15, must first have moved rearwardly, and the inward movement thereof is of course limited by its peripheral iiange 38. Although the plates 16, due to the friction therebetween, act practically without recoil, and again assume normal position gradually when the impact stress has been dissipated or removed, the outward movement of the member 14-15, is limited by the side flanges 39, engaging the inner end of the guide plate 12.

I am aware that various details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do not propose limiting the patent granted otherwise than necessitated by the prior art.

I claim as my invention:

1. A bufling gear of the class described comprising a casting, a top wall and a bot tom wall integrally formed thereon, parallel retaining ribs integrally formed on said walls, guide elements removably secured to said walls abutting said ribs, an abutment member movably mounted within said casting between said guide elements, means on said abutment member adapted to Contact theguide elements to limit the inward and outward movement of said abutment member, buffer means movably associated with said casting, and resilient means disposed betweenl said abutment member, said casting and said buffer means acting to resist inward movement of Said buffer means and said abutment member.

2. In a bufing gear of the class described, a casing, a buffer element slidably engaging the same, retaining ribs integrally formed in said casing, guide elements removably secured in said casing abutting said retaining ribs, an abutment member movably engaged between said guide elements, a peripheral flange integrally formed on the outer end thereof to limit the inward movement thereof, side flanges integrally formed on saidabutment member intermediate the ends to limit the outward movement thereof, a head integrally formed on said abutment member, and resilient means disposed on each side thereof adapted to resist inward movement of said buffer member and said abutment member.

3. In a bufing gear of the class described, a casing, retaining ribs formed therein, guides removably secured within said casing abutting said ribs, a movable buffer member associated with said casing, a movable oasing mounted within said casing between said guides, resilient means seated therein and bearing against saidbuifer member to resist the inward movement thereof, means integrally formed on said movable casing adapted to contact said guides to limit the movement of said movable casing, and means mounted between said casings acting to resist inward movement of said movable casing.

4. ln a device of the class described, a casing, a bu'er Y member slidably engaged thereon, means guiding said bu'er member and having pivotal connection therewith, a plurality of resilient means disposed at the ends and centrally of said buffer member coacting to resist inward movement thereof with respect to the casing, ribs integrally formed in said casing, uides removably secured in said casin afbutting said ribs, a movable member wittliin the casing aifording a seat for said centrall disposed resilient means, resilient mechanisms in said casing, a flange at one end of said movable member, flanges centrally disposed on said movable member, said flanges adapted to abut said guides to limit the movement of said movable member, and a convex abutment head on the other end of said movable member adapted to contact said resilient mechanisms to resist inward movement of said movable member.

In testimony whereof I have hereunto subscribed my name in the presence of two subscribing witnesses.

ARTHUR C. DAVlllDSON.

Witnesses:

CHARLES W. HILLS, Jr., EARL M. HARDINE.

@epilee of this patent may be obtained for ve cents each, by addreeallmmgI the Commissioner et Patente. Washington, m.. @3 

